do not ever use a wrench to tighten on an oil filter and in your case the tranny filter as well hand tighten only use disposable latex gloves for grip also did you lube the seal on the oil filter with oil where is the tranny fluid coming out of color of the filter varies by brand protip if it doesnt want to thread on by hand for at least several turns somethings wrong dont feel too stupid im pretty sure that tranny filter is just an oil filter in a different thread size honest mistake if your tranny fluid is that dark it probably needs a change too the gungho muscle man if it doesnt work use more muscles attitude doesnt really work anywhere except the gym and crankshaft bolts